【作者】 张东林；

【导师】 叶冬青；

【作者基本信息】 安徽医科大学 ， 流行病与卫生统计学， 2006， 硕士

【摘要】 目的：建立在混合牙列早期预测恒侧切牙牙冠及恒侧切牙至第二前磨牙冠宽和的回归方程。 方法：采用随机抽样方法选择在校一年级大学生进行口腔检查，获取中性(牙合)关系、牙齿排列整齐、覆(牙合)、覆盖正常的200例(男性148例，女性52例)牙列石膏模型，游标卡尺测量出单侧上下颌中切牙至第一恒磨牙近远中径等反映牙齿大小的指标。通过逐步回归方法，建立侧切牙牙冠、侧切牙至第二前磨牙冠宽和的多元回归方程。 结果：分别以下颌中切牙、第一恒磨牙指标，建立了预测下颌侧切牙牙冠、下颌侧切牙至第二前磨牙冠宽和的方程，以及预测上颌侧切牙牙冠、上颌侧切牙至第二前磨牙冠宽和的方程；以上、下颌中切牙、第一恒磨牙指标，建立了预测上颌侧切牙牙冠、上颌侧切牙至第二前磨牙冠宽和的方程。同时也根据性别差异分别建立了相应的方程。 结论：在混合牙列早期进行牙列分析时，可根据已萌出的上下颌中切牙及第一恒磨牙来预测未萌侧切牙冠宽、侧切牙至第二前磨牙的冠宽和。更多还原

【Abstract】 Objective :In this study , regression equations (prediction equations) were established for the purpose of accurately predicting the mesiodistal widths of the crowns of unerupted lateral incisors .canines and premolars during the early mixed dentition . Methods: 200 single side plaster casts of both jaws (148 male. 52 female ) were collected from wannan medical college students who were selected randomly by normal teeth, occlusion, over jet ,and over bite. The mesiodistal diameter etc. indexes of the crowns of the central and lateral incisors ,canine ,both premolars and first permanent molars were measured by vernier caliper (0.02mm). They were statistically analyzed in multiple stepwise regression analysis. Results: A series of regression equations were derived from the measurement results by which the widths of lateral incisor and the sums of the widths of the crowns of lateral incisor ,canine and both premolars can be predicted with the indexes of central incisor and firs permanent molar in different jaws and sexes .Conclusions: During early period of the mixed dentition, the widths of crowns of unerupted lateral incisor and the sum of widths of crowns of unerupted lateral incisor ,canine and both premolars can be predicted for anahsis of dentition space .更多还原